Babies R Us always has glass bottles. They're with all the plastic ones. They usually only have one kind, so they're sometimes hard to find. Also, there are some juices that come in bottles the same size as a standard bottle nipple ring. Also, I didn't formula feed, but I got a couple of samples of liquid formula, and I kept the glass jars and used those as bottles (they're designed to just screw a nipple and ring onto). Those were a really nice size, actually, because they were smaller than the big 8 oz glass bottles I bought.
I've also seen 8 oz glass bottles for sale in drugstores sometimes. I've never seen smaller than 8 oz sizes, though, except for juice and formula bottles.
